Fountain pen



Jan. 12, 1932.

L, R. YOKOYAMA FOUNTAIN P EN L @U16 YKYYMTOR Wrr Es Z MM ATTORNEY Patented Jan. 12, 1932 LOUIS R. YOKOYAMA,

0F NEW YORK, N. Y.

FOUNTAIN PEN Application led December 6, 1930. Serial No. 500,642.

This invention relates to fountain pens and more particularly to a fountain pen of the self-filling type.

The primary object of the invention is t 0 .ji construct a fountain pen of simple and pract1 cal form, so that the lling of the ink reservoir may be accomplished with great facility, and for this purpose the invention comprehends the use of a conventional form of dropper as an ink reservoir within the barrel of the pen, whereby the usual rubber ink sack is eliminated and a glass reservoir substituted therefor which is less subject to deterioration and capable of ready replacement by the user whenever necessary.

Another object of the invention isto con-4 struct the barrel of the fountain pen so that the saine will include a gauge wherebythe amount of ink in the reservoir may be readily 2@ determined by the user in advance of the complete exhaustion of the ink supply, which has been a deflect of fountain pens as heretofore constructed.

Still further objects are to simplify and im- 25 prove the construction of fountain pens generally and to reduce the cost of manufacture thereof, and to provide a fountain pen which will be extremely practical and convenient to use.

Other obiects and advantages of the invention will be hereinafter specifically pointed out, or will become apparent, as the specification proceeds.

With the above indicated obJects in view, the invention resides in certain novel constructions, and combinations and arrangementV of parts, clearly described in the f0 1- lowingv specication and fully illustrated 1n the accompanying drawings, which latter 4 show embodiments of the invention as at present preferred.

1n the drawings: Fig. 1 is a View of the present fountain pen in side elevation.

59 Fig. fl is a. transverse sectional view Fig. 2 is a vertical sectional view through through the barrel of the pen at the sight gauge, taken on `the line 4 4 of Fig. 2, lookingin the direction of the arrows.

` Referring lto the drawings'the fountain pen in this instance includes a barrel 10 hav- 56 ing a rearward portion 11` of'reduced `diameterZ for reception of the rear cap 12. The front end of vthe barrel is equipped with a stem- 13, in which stem there is fitted an ink feed memberli, which latter may be of con- '60 ventional form.

The stem 13 has a shank portion 15,'to which is Vfitted latubular member 16, which may be of rubberorlike material. Ay glass dropperl 17, which-may be of f conventional form, is inserted within the rubber tubular member 16 vlwith` an air-tight fit between the body offthe'dropper and they interior of the tubular member 16,- with the discharge end 18 of the dropper in proximity to the ink '70 channelf19 offthe feed 14.A The drop er is desirably'secured in place within the arrel by means of a packing ring 20placed about the neck portion 21 of thc rubber bulb 22.

With the-parts assembled as described, the pensis lillcdby immersing the nib portion 23 inthe ink' and compressingthe bulb 22. Thereupon, the inlcwill be rdrawn into the dropper body, 17. The rear cap 12 is then applied'to the'reduced portion 11, thereby protecting'tliebulb 22 againstr accidental compression.v As the pen is used, the ink will flow from the discharge end 18 of the dropper-toA the ink passage 19 of the feed 14. An important feature of the invention resides in tlie'provision of an Aair chamber 31 around the discharge end 18 of the dropper to promote attraction of the ink from the dropperbody 17 to the ink passage 19. A

After the rpen has beenused av short time, it may be desirable to inspect the ink supply, and forithis purpose the rearward portion 11 of the barrel is provided with a cutoutportion atopposite sides, here indicated at 24 and 25. lVith the cap 12 removed, and the pen heldin writing position, the ink supply within the dropper body 17 may be readily inspected, as seen in' Fig. 3. Then it found that the supply of ink has dropped to such an extent that the ink is not visible 5" vcap 30 of substantially conventional form.

Considerable particularities of description, l

as to materials, part details, dimensions, ca-

pacities and utilities may have been herein e Y indulged in, but it will be understood that Y these statements, made with particular reference to that one, and the one nonr preferred, of the many possible embodiments of theinvention which is illustrated in the drawings, are not in `any Way tol be taken as definitive or limitative of theinvention. Inasmuchas many changes could be made in the above construction, and many apparently Widely different embodiments ofthe invention could bevmade Without, departing from'fthe vscope thereof,it is intended that all, matter contained inl theabove description or shown in the accompanying drawing shall be; interpretedy as illustrative and not ina ,limiting eerlee.-

y l -v AK is also lto be understood that the laneueeeeelrterlerlirr thefollowng claim ils-in-Y .,eerlderlife @over ell the. generi@ end epeeie .features efY .the :invention herein described, .and `all statements Uof the scope "of the invention which', asa'matter of language,rmight be Seid te` .fell therebetween. Y Y L i Infotherwords, the scope of protection contemplated 'is tofnb'etaken solely lfrom the Y`iepellfled Gleim, interpreted es loroadly-k es isconsistent with the prior arti, f

f What I claim as new is:

` A `fountain penincluding-a barrelfopen at A its rearward end. and having a' stem, a holl-ow'feed member and a nib'secured 1n said stem,aresilientltubular member securedto Y l said stem, a removablereservoir positioned in vsaid resilient tubular member, *saidy Vreservoir including a Vnon-collapsible ink holding' cylinder gripped bysaid resilient tubular member and having a reduced diameter portiondisposed in said tubular member, there being` air space extending lfrom one end oi said reduced portionand beyond the same and communicating with theinterior of said i.

hollow feed member, `a collapsible suction member at theyopposite endof said cylinder extendingbeyond the rearward-k open end off'said barrel, a locking `"ring 'between said collapsible suction member and said barrel, anda cap ,for the lrearwardend of said barrel, said cap adapted to be positioned over said collapsiblesuction' member. fl Y 1;

.In testimony v'rliereofl I hereby aiiix my l. 'i Louis n.: YOKQYMA; 

